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<div id="layout">
  <div id="layout-content"><div id="function.svn-diff" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">svn_diff</h1>
  <p class="verinfo">(PECL svn &gt;= 0.1.0)</p><p class="refpurpose"><span class="refname">svn_diff</span> &mdash; <span class="dc-title">Recursively diffs two paths</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.svn-diff-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>svn_diff</strong></span>(<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type">string</span> <code class="parameter">$path1</code></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type">int</span> <code class="parameter">$rev1</code></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type">string</span> <code class="parameter">$path2</code></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type">int</span> <code class="parameter">$rev2</code></span><br>): <span class="type">array</span></div>

  <p class="para rdfs-comment">
   Recursively diffs two paths, <code class="parameter">path1</code> and
   <code class="parameter">path2</code>.
  </p>
  <blockquote class="note"><p><strong class="note">注意</strong>: 
   <p class="para">
    This is not a general-purpose diff utility. Only local files
    that are versioned may be diffed: other files will fail.
   </p>
  </p></blockquote>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.svn-diff-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">path1</code></dt>

     <dd>

      <p class="para">
       First path to diff. This can be a URL to a file/directory in an SVN
       repository or a local file/directory path.
      </p>
      <blockquote class="note"><p><strong class="note">注意</strong>: <span class="simpara">相对路径将会以PHP执行文件所在目录作为当前工作目录进行解析。如果希望依据脚本所在目录解析, 使用<span class="function"><a href="function.realpath.html" class="function">realpath()</a></span> 或 dirname(__FILE__)。</span></p></blockquote>
      <div class="warning"><strong class="warning">警告</strong>
       <p class="simpara">
        If a local file path has only backslashes and no forward slashes,
        this extension will fail to find the path. Always
        replace all backslashes with forward slashes when using this
        function.
       </p>
      </div>
     </dd>

    
    
     <dt>
<code class="parameter">rev1</code></dt>

     <dd>

      <p class="para">
       First path&#039;s revision number. Use <strong><code>SVN_REVISION_HEAD</code></strong>
       to specify the most recent revision.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">path2</code></dt>

     <dd>

      <p class="para">
       Second path to diff. See <code class="parameter">path1</code> for description.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">rev2</code></dt>

     <dd>

      <p class="para">
       Second path&#039;s revision number. See <code class="parameter">rev1</code>
       for description.
      </p>
     </dd>

    
   </dl>

  </p>

 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.svn-diff-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns an array-list consisting of two streams: the first is the diff output
   and the second contains error stream output. The streams can be
   read using <span class="function"><a href="function.fread.html" class="function">fread()</a></span>. Returns <strong><code>false</code></strong> or <strong><code>null</code></strong> on
   error.
  </p>
  <p class="para">
   The diff output will, by default, be in the form of Subversion&#039;s
   custom unified diff format, but an
   <a href="http://svnbook.red-bean.com/en/1.2/svn.advanced.externaldifftools.html" class="link external">&raquo;&nbsp;external
   diff engine</a> may be
   used depending on Subversion&#039;s configuration.
  </p>
 </div>


 

 

 <div class="refsect1 examples" id="refsect1-function.svn-diff-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4569">
    <p><strong>示例 #1 Basic example</strong></p>
    <div class="example-contents"><p>
     This example demonstrates the basic usage of this function, and
     the retrieval of contents from the stream:
    </p></div>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">list(</span><span style="color: #0000BB">$diff</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$errors</span><span style="color: #007700">)&nbsp;=&nbsp;</span><span style="color: #0000BB">svn_diff</span><span style="color: #007700">(<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'http://www.example.com/svnroot/trunk/foo'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">SVN_REVISION_HEAD</span><span style="color: #007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #DD0000">'http://www.example.com/svnroot/branches/dev/foo'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">SVN_REVISION_HEAD<br /></span><span style="color: #007700">);<br />if&nbsp;(!</span><span style="color: #0000BB">$diff</span><span style="color: #007700">)&nbsp;exit;<br /></span><span style="color: #0000BB">$contents&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">''</span><span style="color: #007700">;<br />while&nbsp;(!</span><span style="color: #0000BB">feof</span><span style="color: #007700">(</span><span style="color: #0000BB">$diff</span><span style="color: #007700">))&nbsp;{<br />&nbsp;&nbsp;</span><span style="color: #0000BB">$contents&nbsp;</span><span style="color: #007700">.=&nbsp;</span><span style="color: #0000BB">fread</span><span style="color: #007700">(</span><span style="color: #0000BB">$diff</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">8192</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$diff</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$errors</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$contents</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Index: http://www.example.com/svnroot/trunk/foo
===================================================================
--- http://www.example.com/svnroot/trunk/foo        (.../foo) (revision 23)
+++ http://www.example.com/svnroot/branches/dev/foo (.../foo) (revision 27)
 // further diff output
</pre></div>
    </div>
   </div>
  </p>
  <p class="para">
   <div class="example" id="example-4570">
    <p><strong>示例 #2 Diffing two revisions of a repository path</strong></p>
    <div class="example-contents"><p>
     This example implements a wrapper function that allows a user
     to easily diff two revisions of the same item using an external
     repository path (the default syntax is somewhat verbose):
    </p></div>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">function&nbsp;</span><span style="color: #0000BB">svn_diff_same_item</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$rev1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$rev2</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span style="color: #0000BB">svn_diff</span><span style="color: #007700">(</span><span style="color: #0000BB">$path</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$rev1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$path</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$rev2</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
  <p class="para">
   <div class="example" id="example-4571">
    <p><strong>示例 #3 Portably diffing two local files</strong></p>
    <div class="example-contents"><p>
     This example implements a wrapper function that portably
     diffs two local files, compensating for the <span class="function"><a href="function.realpath.html" class="function">realpath()</a></span>
     fix and the backslashes bug:
    </p></div>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">function&nbsp;</span><span style="color: #0000BB">svn_diff_local</span><span style="color: #007700">(</span><span style="color: #0000BB">$path1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$rev1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$path2</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$rev2</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$path1&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">str_replace</span><span style="color: #007700">(</span><span style="color: #DD0000">'\\'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'/'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">realpath</span><span style="color: #007700">(</span><span style="color: #0000BB">$path1</span><span style="color: #007700">));<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$path2&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">str_replace</span><span style="color: #007700">(</span><span style="color: #DD0000">'\\'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'/'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">realpath</span><span style="color: #007700">(</span><span style="color: #0000BB">$path2</span><span style="color: #007700">));<br />&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span style="color: #0000BB">svn_diff</span><span style="color: #007700">(</span><span style="color: #0000BB">$path1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$rev1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$path2</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$rev2</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.svn-diff-notes">
  <h3 class="title">注释</h3>
  <div class="warning"><strong class="warning">警告</strong><p class="simpara">此函数是<em class="emphasis">实验性</em>的。此函数的表象，包括名称及其相关文档都可能在未来的
PHP 发布版本中未通知就被修改。使用本函数风险自担。</p></div>
 </div>

 
 <div class="refsect1 seealso" id="refsect1-function.svn-diff-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><a href="http://svnbook.red-bean.com/en/1.2/svn.ref.svn.c.diff.html" class="link external">&raquo;&nbsp;SVN documentation on svn diff</a></li>
   </ul>
  </p>
 </div>


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